_array_ queryParam converted to _string_ after transitionTo

[arturkot]

Hi,

a demo: https://ember-twiddle.com/650b6fb3657bf037a40170f3b1e74b84

Steps to reproduce (here's a quick video: https://v.usetapes.com/V0vlZepqbw):

1. Use "My Route!" link.
2. Click either "Set array" or "Set all" to update the array parameter.
3. The array parameter is now a string (and should remain an array).

Notes:

• "my-route" route uses application controller controllerName: 'application' to access query parameters from the parent route/controller.
• When you comment out this.transitionTo('application') setting parameters will work as expected (array parameter remains an array).
• "reset params" sets an empty array and that doesn't trigger the error.
• I've noticed the error after updating from Ember 2.4.1 to 2.4.5. I can confirm that 2.4.1 doesn't have this error.

Thanks,

Artur

[vomchik]

Ember 2.5.1 has the some problem.

[lolmaus]

This issue has been mentioned here: #13273 (comment)

[acorncom]

@arturkot Further background can be found #13600 Your issue should be resolved with 2.4.6 (as the changes that were the issue were reverted).

For Ember 2.5+ I'm unclear on whether this issue continues to be a problem or not in the latest versions.

I'll close this issue for now

[arturkot]

Big thanks for looking into that!

[lolmaus]

@acorncom

For Ember 2.5+ I'm unclear on whether this issue continues to be a problem or not in the latest versions.

Quoting @Sinled from #13273 (comment) :

2.4.6 fixed my problem with query params serialisation, but it still present in 2.6.0

[lan0]

Can this issue be reopened?

The behavior of the twiddle in the OP differs slightly in 2.6.2 and 2.7.0:
While in 2.6.2 the array got converted to a string immediately after clicking on Set array, in 2.7.0 the initial Set array works fine but a subsequent click on Set number transforms the array into a string.